Composite sheet material



Jun 11, 1929. WHI PEY 1,716,402

COMPOSITE SHEET MATERIAL Original Filed Dec. 26. 1924 Patented June 11, 1929.,

UhllE ZFTES errata COMPOSITE SHEET IVIATERIAL.

Application filed December 26, 1924:, Serial No. 758,114. Renewed June 24, 1927.

The present invention has to do with sheet material adapted to be employed for packing boxes and the like, and relates particularly to a reinforcing material used in the construction of such sheets and the process by which such sheets are obtained.

Among the objects of the invention are the following 2- The production of a reinforced paper or similar sheet of an unique construction and design;

The employment of a novel metallic reinforcing in such a sheet whereby an improved and stronger product is obtained;

The novel arrangement of metallic members for reinforcing purposes in connection with sheet material; and

Means for adaptation of scrap sheet metallic material to the production of reinforced paper.

These, and such other objects as may hereinafter appear, are obtained by the novel combination, construction, and arrangement of the several elements which constitute the composite material, forms of which are illustrated in the accompanying single sheet of drawing hereby made a part of this specification.

In the drawing Figure 1 is a top view of a reinforced sheet comprising one form of the invention, the reinforcing being shown in light lines.

Figure 2 is a similar view of a second form of sheet material embodying the invention, the reinforcing therein being shown also in light lines.

Figure 8 is a vertical section on line 83 of Figure 1.

Figure 4 is a vertical section at right angles to Figure 3, and upon the lines l& of Figure 1.

Figure 5 is a vertical section on line 55 of Figure 2.

Figure 6 is a vertical section showing one form of ribbed reinforcing employed in the sheet material here illustrated.

Figure 7 shows in vertical section a detail of the joinder between sheets of reinforcing material.

Figure 8 is a similar view showing a second method of cinder between such sheets.

Like reference characters are used to designate similar parts in the drawing and in the specification which follows.

In Figures 1 and 2, are disclosed two forms which the complete article may take. Figures 3 and at and 5 are sections through Figures 1 and 2 showing the position, configuration and arrangement of the metallic reinforcing members therein.-

Cardboard and corrugated paper have been employed for packing boxes and for other purposes where wood and similar sheet materials have been found useful. Cardboard, of itself, has not sufficient structural strength to provide a satisfactory packing case or the like, and'corrugations, while strengthening the sheet material, have not made it sufiicient- 1y strong to stand the strain of hard shipment or cartage handling. Withthe rapid decrease in the supply of box wood, and the continual lowering of the quality of the ma- *erial from whichboxes may be made, the urgency of a new packing material of high strength has rapidly increased until, at the present time, there is a crying demand, ever increasing, for a substitute sheet material for the production of boxes In a great number of industries relatively thin metallic sheet material is required. There is always more or less wastage where such plate or sheet material is employed for sheets are made of standard sizes, and it is a part of this invention to adapt the waste fragmentary sheets to become an integral part of such a composition sheet which is here described, which sheet may also be produced from sheet material of standard size.

Sheet metal such as iron, steel, and aluminum, bends freely in all directions, may be easily dented, and is. altogether unsatisfactory for reinforcing purposes unless fortified against these defects. Where a standard sheet of reinforcing material is employed, I propose to crimp said sheet after the fashion shown in Figure 6, the numeral 10 designating the sheet, and the numeral 11 indicating the folded over ortions thereof. The sheet 10 should be so olded at spaced intervals to provide a ribbed reinforcementextending the length of the sheet, and this crimping provides a resistance against bending in any direction, and most particularly, in a direction at right angles to the crimps. 7

Many of the fragmentary sheets of waste material are so narrow that in order to provide a sheet of suficient dimension to be useful in packing'purposes and which may be commercially exploited, several of such sheets must be joined one to another. Two types thicknesses of material coextensive with the 7 length of the joinder. The horizontal plane occupied by sheet 10 is beneath that occupied by 10, and in practicing the invention it is usual and'customary to provide a sheet in the plane with 10, an adjoining sheet in the horizontal plane of sheet 10", and the next succeeding sheet in the same plane as sheet 10". In this way, all sheets may be alike in respect to having their hook ends pointed inwardly upon the same side of the sheet, and in the depth of fold required to provide the hook. Thus the various narrow sheets employed may be produced in a single bending machine, each alternate sheet being reversed in position when ready for assembly and permanent joinder.

In Figure 8, sheets 10 and 10 are united by a somewhat similar hook arrangement. However, sheet 10 is provided with an additional bend l0 whereby, after joining hook ends 11 and 11, the sheets 10 and 10 occupy the same horizontal plane. A reinforcing portion or rib of three thickness of material is thereby provided upon the margin of sheet 10.

Pulp or other coating material, indicated at 12, for the purpose of providing a composite sheet and a protective cover for said reinforced metal sheets is applied, in any conventional manner, to the reinforced sheets which have been described. The composite sheet may then be marketed with the reinforcements running in one direction only, providing an article adaptableto many uses, but a much stronger sheet and one adapted to be employed for a greater number of purposes, is illustrated in Figure 1.

After having provided a plurality of ribs by one of the means which have been indicated in Figures 6, 7 and 8, the reinforcing sheet is folded after the fashion shown in Figure 6 a plurality of times perpendiculz-irly to the first made reinforcements whereby a further metallic reinforcement at spaced intervals and having the cross sections shown in Figures 3 and 4 is obtained. This sheet of reinforcing material when coated with pulp or other covering material, will successfully resist flexing in any direction, and has sulficient strength to protect against the wear and tear of the'roughest of handling.

It is some times desirable to use oblique reinforcing in connection with the parallel ribbed reinforcin just described and a plurality of oblique olds such as are illustrated in Figure 5 may be provided in thereinforcing sheet as indicated in Figure 5, and the sheet flattened, preliminary to coating with the paper pulp or other coating substance.

The reinforcing may take the other shapes and forms, the invention being the provision of sheet reinforcing having spaced ribs or the like for added strength, and the adaptation of a composite material as described to a process of manufacture involving the employment of scrap sheets of metal, the means for uniting such scrap sheets providing the reinforcement necessary to lend strength to the finished article.

I claim: 1. A composite material comprising a core and a covering therefor, said core comprising sheets Of'lTlGllEtl articulated upon themselves and joined one to another and overlapping at the margin of. jointurc, and said covering comprising a protective adhering sheet.

2. A composite material comprising a metallic core of sheet metal articulated upon itself to form reinforcing folds, and a covering therefor of paper pulp reduced to a dry state, said covering closely engaging the folds of said articulated core to. constitute a pro tective covering therefor.

3. A composite material comprising metallic sheets disposed in extended relation, said sheets being folded upon one another to form margins of jointure constituting reinforcing ribs, acovering therefor constituting a protective adhering sheet, and articulations in said sheet material disposed angularly of said margins of jointure to further increase the rigidity of said sheet material.

. 4;. A composite material comprising metallic sheets disposed in extended relation, said sheets being folded upon one another to form margins of jointure constituting reinforcing ribs, and ribs impressed in said sheet material intermediate said margins of ointure to further increase the rigidity of said sheet material.

5. A composite material comprising metallic sheets disposed in extendedrelation, said sheets being folded upon one another to form margins of jointure constituting reinforcing ribs, ribs impressed in said sheet material intermediate said. margins of jointure, and folds impressed in said sheet material angularly of said ribs to increase the rigidity thereof.

6. A composite material comprising metallic sheets disposed in extended relation, said sheets being folded upon one another to form margins of jointure constituting reinforcing ribs, ribs impressed in said sheet material intermediate said margins of jointure to further increase the rigidity of saidsheet material, and a covering constituting a protective adhering sheet associated with said sheet material.

FREDERICK C. l VHIPPEY. 

